I have a 1987 Mitsubishi Mighty Max 4 x 4 with the 2.6 l motor. Is this truck a wide block or narrow block motor? The reason asking if I have a extra 5 speed trans that is the narrow block style I'm having problems with the current transmission in the truck popping out of first gear and was hoping to use the 5 speed that I have extra to put in the truck instead of having to rebuild the current transmission. I have read that some of these 2.6 Motors are narrow block from a chart that I found on this forum. You guys have always been a great help in the past and I appreciate any input that I receive thanks again everyone I really appreciate the help.